The area of parallelogram is 20cm ^ 2, the height is 5cm, what is the bottom edge It's the height of the middle line, and it's a formula,

The area of parallelogram is 20cm ^ 2, the height is 5cm, what is the bottom edge It's the height of the middle line, and it's a formula,

The area of a parallelogram is equal to the bottom multiplied by the height. If the area and height are known, the bottom = area divided by the height = 4cm

In the blasting of mountain opening project, it is known that the burning speed of fuse is 0.5cm/s, and the speed of human running away is 4m / S. in order to make the blasting personnel safely run to the safe area beyond 100m, the inequality that the length of fuse x (CM) should satisfy is ()
A. 4×x0.5≥100B. 4×x0.5≤100C. 4×x0.5＜100D. 4×x0.5＞100

According to the meaning of the title, 4 × x0.5 ＞ 100

In the blasting of the mountain opening project, the burning speed of the fuse is known to be 0.5cm/s, and the running speed of the person is 6m / S. in order to make the blasting person run safely during the blasting
In the blasting of the mountain opening project, it is known that the burning speed of the fuse is 0.8cm/s, and the speed of the person running away is 4m / S. in order to make the person blasting safely run to the safe area beyond 100m, how many cm is the length of the fuse?

100m = 10000 cm, 4m / S = 400 cm / S
10000÷400×0.8
=25×0.8
=20
A: the length of the fuse is more than 20 cm

During the blasting construction, the burning speed of the fuse is 0.8m/s, and the worker's running speed is 5m / s, so that the igniter can run to the safe place beyond 100m during the construction
In the whole area, how many fuse wires do you need?

With x m length
X/0.8>=100/5
X>=16
The X is 16 meters

During blasting construction, the burning speed of fuse is 0.8cm/s, and the speed of people running away is 5m / S. in order for the soldiers who ignite the fuse to run to a safe area 100m away from the blasting point, how long is the fuse at least?

Let the fuse be at least xcm long, x0.8.5 ≥ 100, X ≥ 16, so the fuse should be at least 16cm long

The burning speed of the fuse is known to be 0.5cm/s when blasting in the mountain opening project
In the blasting of the mountain opening project, the burning speed of the fuse is known to be 0.5cm/s, and the speed of the person running away is 4m / S. in order to make the person blasting safely run to the safe area beyond 100m, the length of the fuse should be at least cm

12.5

What is 8km / S? 8km / h

8km/s=8km*3600/h=28800km/h

2m / s, 10.8km/h, how to become the same unit

10.8km/h=10800m/3600s=3m/s
2m/s=7200m/3600s=7.2km/h

1km/min=______ m/S 1.8km/min=______ m/S
Just write on the line

16.66667,30

How many M / S is a light year
Light propagation in air = 3 × 10 × 10 × 10 × 10 × 10 × 10 × 10m / s, 365 days
3×10×10×10×10×10×10×10×10×365×24×60×60

A light year is the distance that light travels for a year
3 * 10 ^ 8 * 365 * 24 * 60 * 60 (m) = 9460.8 billion km